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A Study of the Effects of Surface Modifications and Process on the Fatigue Properties of NiTi Wire

Mark A. Polinsky, Dennis W. Norwich, Ming H. Wu; Memry Corporation, Bethel, CT. Proceedings, SMST-2006, Pacific Grove, California.

Several studies on the processing effects on NiTi fatigue were published in the recent past. However, there were disagreements and debates with respect to the interpretation on these results. In hope to provide a more comprehensive understanding of this issue, a study on the fatigue properties of NiTi wires, Ti-55.8/55.9 wt %Ni in composition, comparing the various effects of surface finishes and heat treatments was conducted using a rotating beam test method in a 37oC water bath…. Download the entire paper.